CVE-2016-3372 in Windows
Summary
by MITRE
The kernel API in Microsoft Windows Vista SP2 and Windows Server 2008 SP2 does not properly enforce permissions, which allows local users to spoof processes, spoof inter-process communication, or cause a denial of service via a crafted application, aka "Windows Kernel Elevation of Privilege Vulnerability."
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Analysis
by VulDB Data Team • 09/16/2022
The vulnerability identified as CVE-2016-3372 represents a critical kernel-level permission enforcement flaw in Microsoft Windows Vista SP2 and Windows Server 2008 SP2 operating systems. This vulnerability resides within the kernel API component where proper access controls and permission validation mechanisms have been compromised, creating opportunities for malicious exploitation. The flaw specifically affects the Windows kernel's ability to maintain proper isolation between processes and system components, fundamentally undermining the security model that protects against unauthorized privilege escalation.
The technical implementation of this vulnerability stems from insufficient validation of kernel API calls and process permissions within the Windows operating system kernel. Attackers can craft malicious applications that exploit this weakness to manipulate kernel-level operations, enabling them to spoof legitimate processes and establish false identities within the system. The vulnerability allows for the manipulation of inter-process communication channels, effectively breaking the security boundaries that normally prevent unauthorized access between different processes. This permission bypass occurs at the kernel level, meaning that successful exploitation can result in complete system compromise with elevated privileges that bypass standard user access controls.
From an operational impact perspective, this vulnerability creates significant risks for organizations running affected Windows versions. Local users who can execute malicious code on a target system gain the ability to perform process spoofing operations that can evade detection by security monitoring tools. The capability to spoof inter-process communication enables attackers to manipulate system behavior, potentially redirecting system calls to malicious handlers or intercepting legitimate communications. Additionally, the vulnerability can be exploited to cause denial of service conditions, disrupting critical system operations and potentially leading to complete system instability or crashes. The implications extend beyond simple privilege escalation as the vulnerability can be leveraged to establish persistent access or facilitate further exploitation of other system components.
The vulnerability aligns with CWE-284, which addresses improper access control in software systems, and relates to the ATT&CK technique T1068, which covers "Exploitation for Privilege Escalation." Organizations should implement immediate mitigations including applying the relevant Microsoft security patches, implementing application whitelisting policies to prevent unauthorized code execution, and monitoring for suspicious process creation or inter-process communication patterns. System administrators should also consider implementing enhanced logging and monitoring of kernel-level activities, particularly around API calls and process manipulation operations. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and the potential risks associated with running legacy operating systems that may not receive ongoing security support. Organizations should also review their privilege management policies and implement least privilege principles to minimize the impact of potential exploitation, as this vulnerability can be leveraged to establish persistent access to systems with elevated privileges.